Orientation distribution of cylindrical particles suspended in a turbulent pipe flow
نویسندگان
چکیده
منابع مشابه
Intermittent distribution of heavy particles in a turbulent flow
The retardation of weakly inertial particles depends on the acceleration of the ambient fluid. The concentration n of the particles is determined by the divergence of Lagrangian acceleration which we study by a direct numerical simulation. We show that the second moment of the concentration coarse-grained over the scale r behaves as an approximate power law : 〈nr〉 ∼ rα. We study the dependencie...
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چکیده ندارد.
15 صفحه اولManipulating Flow Structures in Turbulent Pipe Flow
Two different tools, the non-empirical resolvent analysis and the data-based dynamic mode decomposition, are employed to assess the changes induced by transpiration in the dynamics of a turbulent pipe flow. The focus is on very large-scale motions. Both analyses permit the observation of streamwise waviness in the large flow structures and how the transpiration can inhibit fluctuation in locali...
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متن کاملSlug genesis in cylindrical pipe flow
Transition to uniform turbulence in cylindrical pipe flow occurs experimentally via the spatial expansion of isolated coherent structures called ‘slugs’, triggered by localised finite-amplitude disturbances. We study this process numerically by examining the preferred route in phase space through which a critical disturbance initiates a ‘slug’. This entails first identifying the relative attrac...
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ژورنال
عنوان ژورنال: Physics of Fluids
سال: 2005
ISSN: 1070-6631,1089-7666
DOI: 10.1063/1.2046713